1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/*
* Copyright (C) 2007-2008 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* $Id: eap_identity.c 4276 2008-08-22 10:44:51Z martin $
*/
#include "eap_identity.h"
#include <daemon.h>
#include <library.h>
typedef struct private_eap_identity_t private_eap_identity_t;
/**
* Private data of an eap_identity_t object.
*/
struct private_eap_identity_t {
/**
* Public authenticator_t interface.
*/
eap_identity_t public;
/**
* ID of the peer
*/
identification_t *peer;
/**
* received identity chunk
*/
chunk_t identity;
};
typedef struct eap_identity_header_t eap_identity_header_t;
/**
* packed EAP Identity header struct
*/
struct eap_identity_header_t {
/** EAP code (REQUEST/RESPONSE) */
u_int8_t code;
/** unique message identifier */
u_int8_t identifier;
/** length of whole message */
u_int16_t length;
/** EAP type */
u_int8_t type;
/** identity data */
u_int8_t data[];
} __attribute__((__packed__));
/**
* Implementation of eap_method_t.process for the peer
*/
static status_t process_peer(private_eap_identity_t *this,
eap_payload_t *in, eap_payload_t **out)
{
chunk_t id;
eap_identity_header_t *hdr;
size_t len;
id = this->peer->get_encoding(this->peer);
len = sizeof(eap_identity_header_t) + id.len;
hdr = alloca(len);
hdr->code = EAP_RESPONSE;
hdr->identifier = in->get_identifier(in);
hdr->length = htons(len);
hdr->type = EAP_IDENTITY;
memcpy(hdr->data, id.ptr, id.len);
*out = eap_payload_create_data(chunk_create((u_char*)hdr, len));
return SUCCESS;
}
/**
* Implementation of eap_method_t.initiate for the peer
*/
static status_t initiate_peer(private_eap_identity_t *this, eap_payload_t **out)
{
/* peer never initiates */
return FAILED;
}
/**
* Implementation of eap_method_t.process for the server
*/
static status_t process_server(private_eap_identity_t *this,
eap_payload_t *in, eap_payload_t **out)
{
chunk_t data;
data = chunk_skip(in->get_data(in), 5);
if (data.len)
{
this->identity = chunk_clone(data);
}
return SUCCESS;
}
/**
* Implementation of eap_method_t.initiate for the server
*/
static status_t initiate_server(private_eap_identity_t *this, eap_payload_t **out)
{
eap_identity_header_t hdr;
hdr.code = EAP_REQUEST;
hdr.identifier = 0;
hdr.length = htons(sizeof(eap_identity_header_t));
hdr.type = EAP_IDENTITY;
*out = eap_payload_create_data(chunk_create((u_char*)&hdr,
sizeof(eap_identity_header_t)));
return NEED_MORE;
}
/**
* Implementation of eap_method_t.get_type.
*/
static eap_type_t get_type(private_eap_identity_t *this, u_int32_t *vendor)
{
*vendor = 0;
return EAP_IDENTITY;
}
/**
* Implementation of eap_method_t.get_msk.
*/
static status_t get_msk(private_eap_identity_t *this, chunk_t *msk)
{
if (this->identity.ptr)
{
*msk = this->identity;
return SUCCESS;
}
return FAILED;
}
/**
* Implementation of eap_method_t.is_mutual.
*/
static bool is_mutual(private_eap_identity_t *this)
{
return FALSE;
}
/**
* Implementation of eap_method_t.destroy.
*/
static void destroy(private_eap_identity_t *this)
{
this->peer->destroy(this->peer);
free(this->identity.ptr);
free(this);
}
/**
* Generic constructor
*/
static private_eap_identity_t *eap_identity_create(identification_t *server,
identification_t *peer)
{
private_eap_identity_t *this = malloc_thing(private_eap_identity_t);
this->public.eap_method_interface.initiate = NULL;
this->public.eap_method_interface.process = NULL;
this->public.eap_method_interface.get_type = (eap_type_t(*)(eap_method_t*,u_int32_t*))get_type;
this->public.eap_method_interface.is_mutual = (bool(*)(eap_method_t*))is_mutual;
this->public.eap_method_interface.get_msk = (status_t(*)(eap_method_t*,chunk_t*))get_msk;
this->public.eap_method_interface.destroy = (void(*)(eap_method_t*))destroy;
this->peer = peer->clone(peer);
this->identity = chunk_empty;
return this;
}
/*
* Described in header.
*/
eap_identity_t *eap_identity_create_peer(identification_t *server,
identification_t *peer)
{
private_eap_identity_t *this = eap_identity_create(server, peer);
/* public functions */
this->public.eap_method_interface.initiate = (status_t(*)(eap_method_t*,eap_payload_t**))initiate_peer;
this->public.eap_method_interface.process = (status_t(*)(eap_method_t*,eap_payload_t*,eap_payload_t**))process_peer;
return &this->public;
}
/*
* Described in header.
*/
eap_identity_t *eap_identity_create_server(identification_t *server,
identification_t *peer)
{
private_eap_identity_t *this = eap_identity_create(server, peer);
/* public functions */
this->public.eap_method_interface.initiate = (status_t(*)(eap_method_t*,eap_payload_t**))initiate_server;
this->public.eap_method_interface.process = (status_t(*)(eap_method_t*,eap_payload_t*,eap_payload_t**))process_server;
return &this->public;
}
|
